<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
	<head>
		    <meta charset="utf-8">
		    <meta http-equiv="X-UA-Compatible" content="IE=edge">
		    <meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
		    <title>自适应显示多个点标记</title>
		    <link rel="stylesheet" href="http://cache.amap.com/lbs/static/main1119.css"/>
		    <style>
		        .info-tip {
		            position: absolute;
		            top: 10px;
		            right: 10px;
		            font-size: 12px;
		            background-color: #fff;
		            height: 35px;
		            text-align: left;
		        }
		    </style>
		    <script src="http://cache.amap.com/lbs/static/es5.min.js"></script>
		    <script src="http://webapi.amap.com/maps?v=1.3&key=e06178925b8ec4746ca36a53593d07dd"></script>
		    <script type="text/javascript" src="http://cache.amap.com/lbs/static/addToolbar.js"></script>
	</head>
	<body>
<div id="container"></div>
<div class="button-group">
    <input id="setFitView" class="button" type="button" value="地图自适应显示"/>
</div>
<div class="info-tip">
    <div id="centerCoord"></div>
    <div id="tips"></div>
</div>
<script>
    var map = new AMap.Map('container', {
        resizeEnable: true,
        center: [116.397428, 39.90923],
        zoom: 13
    });    
    map.clearMap();  // 清除地图覆盖物
    var markers = [{
        icon: 'http://webapi.amap.com/theme/v1.3/markers/n/mark_b1.png',
        position: [116.205467, 39.907761]
    }, {
        icon: 'http://webapi.amap.com/theme/v1.3/markers/n/mark_b2.png',
        position: [116.368904, 39.913423]
    }, {
        icon: 'http://webapi.amap.com/theme/v1.3/markers/n/mark_b3.png',
        position: [116.305467, 39.807761]
    }];
    // 添加一些分布不均的点到地图上,地图上添加三个点标记，作为参照
    markers.forEach(function(marker) {
        new AMap.Marker({
            map: map,
            icon: marker.icon,
            position: [marker.position[0], marker.position[1]],
            offset: new AMap.Pixel(-12, -36)
        });
    });
    var center = map.getCenter();
    var centerText = '当前中心点坐标：' + center.getLng() + ',' + center.getLat();
    document.getElementById('centerCoord').innerHTML = centerText;
    document.getElementById('tips').innerHTML = '成功添加三个点标记，其中有两个在当前地图视野外！';

    // 添加事件监听, 使地图自适应显示到合适的范围
    AMap.event.addDomListener(document.getElementById('setFitView'), 'click', function() {
        var newCenter = map.setFitView();
        document.getElementById('centerCoord').innerHTML = '当前中心点坐标：' + newCenter.getCenter();
        document.getElementById('tips').innerHTML = '通过setFitView，地图自适应显示到合适的范围内,点标记已全部显示在视野中！';
    });
</script>
	</body>
</html>
